CN110778555B - Embedded pressure compensation valve rod - Google Patents
Embedded pressure compensation valve rod Download PDFInfo
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- CN110778555B CN110778555B CN201911052948.0A CN201911052948A CN110778555B CN 110778555 B CN110778555 B CN 110778555B CN 201911052948 A CN201911052948 A CN 201911052948A CN 110778555 B CN110778555 B CN 110778555B
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- valve core
- oil port
- main valve
- inner cavity
- compensation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/026—Pressure compensating valves
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- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses an embedded pressure compensation valve rod, and belongs to the technical field of hydraulic valves. The end part of the main valve core is provided with an inner cavity, and the main valve core is provided with an oil port A and an oil port B which are communicated with the inner cavity of the main valve core; the compensating valve core I is arranged in the inner cavity of the main valve core; the outer end of the compensating valve core I is connected with a return spring I; an inner cavity is formed at the inner end of the compensation valve core I, and an oil port C and an oil port D which are communicated with the inner cavity of the compensation valve core I are formed in the compensation valve core I; when the main valve core is not communicated with oil, the oil port D is communicated with the oil port B relatively, and the oil port C is not communicated with the oil port A; when the main valve core is filled with oil, the compensation valve core I gradually moves outwards under the action of oil pressure, and the oil port C and the oil port A are gradually and relatively communicated. The invention embeds the compensation valve core into the inner cavity of the main valve core, realizes pressure compensation by the action matching of the compensation valve core and the main valve core, simplifies the structure of the compensation valve, and leads the whole main valve structure to be more compact, smaller in volume and lighter in weight.
Description
Technical Field
The invention relates to the technical field of hydraulic valves, in particular to an embedded pressure compensation valve rod.
Background
The pressure compensation technology is applied to foreign engineering machinery from the beginning of the 80 th 20 th century, and can realize the proportional distribution of flow during multiple actions of the engineering machinery, ensure that each action is effective and reliable and is not influenced by load change.
Nowadays, the pressure compensation technology has been widely applied to engineering machinery through years of development. However, the conventional pressure compensation structure occupies a certain space exclusively, the size of the whole main valve is increased, the oil path is increased, and unnecessary energy loss is increased.
The Chinese patent discloses a hydraulic valve capable of being controlled in a micro mode, a hydraulic control system and engineering machinery (CN 108953262A), and the hydraulic valve comprises a valve body and a valve rod with a valve rod inner cavity, wherein a one-way valve core is installed in the valve rod inner cavity, the one-way valve core divides the valve rod inner cavity into a forward oil cavity capable of being communicated with one oil port of the valve body and a reverse oil cavity provided with a return spring, the valve rod at least comprises a micro control position and a quick control position, and in the micro control position, the forward oil cavity corresponding to at least one-way valve core is communicated to the other oil port of the valve body through the reverse oil cavity in a throttling mode when the one-way valve core.
In the above technology, a valve rod with an inner cavity is provided, and a one-way valve core is installed in the inner cavity, so that the valve rod is relatively single in structure and function, and only serves as a one-way valve, and only plays roles in flow control and throttling, but cannot realize the function of pressure compensation.
Disclosure of Invention
The invention aims to provide an embedded pressure compensation valve rod, which embeds a compensation valve core into an inner cavity of a main valve core and achieves the purpose of pressure compensation through the action matching of the compensation valve core and the main valve core.
The invention is realized by the following technical scheme: an embedded pressure compensation valve rod comprises a main valve core and a compensation valve core I; the end part of the main valve core is provided with an inner cavity, and the circumferential surface of the main valve core is provided with an oil port A and an oil port B which are communicated with the inner cavity of the main valve core; the compensating valve core I is arranged in the inner cavity of the main valve core; the outer end of the compensating valve core I is connected with a return spring I which gives an inward movement force to the compensating valve core I; an inner cavity is formed at the inner end of the compensation valve core I, and an oil port C and an oil port D which are communicated with the inner cavity of the compensation valve core I are formed in the circumferential surface of the compensation valve core I; when the main valve core is not communicated with oil, the oil port D is communicated with the oil port A relatively, and the oil port C is not communicated with the oil port B; when the main valve core is filled with oil, the compensation valve core I gradually moves outwards under the action of oil pressure, and the oil port C and the oil port B are gradually and relatively communicated.
It further comprises the following steps: inner cavities are formed in two ends of the main valve core, and compensation valve cores I in the inner cavities at two ends of the main valve core are symmetrically arranged.
The inner wall of the outer end of the inner cavity of the main valve core is provided with internal threads, and the outer end of the inner cavity of the main valve core is connected with a plug screw I through threads; and the reset spring I is arranged between the outer end of the main valve element and the inner end of the screw plug I.
Compared with the prior art, the invention has the beneficial effects that: the compensating valve core is embedded into the inner cavity of the main valve core, and the pressure compensation is realized through the action matching of the compensating valve core and the main valve core, so that the structure of the compensating valve is simplified, and the compensating valve has the advantages of more compact structure, smaller volume and lighter weight.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of a compensator spool configuration;
FIG. 3 is a hydraulic schematic of an embodiment of the present invention;
in the figure: 1. a main valve element; 2. a compensating valve core I; 3. a return spring I; 4. a screw plug I; 5. a compensating valve core II; 6. a return spring II; 7. a screw plug II; 8. an oil port A; 9. an oil port B; 10. an oil port C; 11. an oil port D; 12. an oil port E; 13. an oil port F; 14. an oil port G; 15. and an oil port H.
Detailed Description
The following is a specific embodiment of the present invention, which will be further described with reference to the accompanying drawings.
Referring to fig. 1 and 2, an embedded pressure compensation valve rod includes a main valve element 1, a compensation valve element i 2 and a compensation valve element ii 5, wherein the compensation valve element i 2 and the compensation valve element ii 5 are symmetrically installed in inner cavities at two ends of the main valve element 1.
The following description takes a compensating valve core I2 as an example:
the compensating valve core I2 is slidably arranged in an inner cavity at the right end of the main valve core 1, and an oil port A8 and an oil port B9 which are communicated with the inner cavity at the right side of the main valve core 1 are formed in the circumferential surface of the main valve core 1. The inner wall of the inner cavity at the right end of the main valve core 1 is provided with an inner circumferential sinking groove corresponding to the oil port A8 and the oil port B9. The inner wall of the outer end of the inner cavity at the right end of the main valve core 1 is provided with internal threads, and the plug screw I4 is fixed in the inner cavity at the right end of the main valve core 1 through threaded connection. A reset spring I3 is arranged between the outer end of the main valve core 1 and the inner end of the screw plug I4, and the reset spring I3 gives an inward movement force to the compensating valve core I2, so that the inner end of the compensating valve core I2 is abutted to the bottom of the inner cavity of the main valve core 1 under the condition of no oil pressure.
An inner cavity is formed at the inner end of the compensation valve core I2, and an oil port C10 and an oil port D11 which are communicated with the inner cavity of the compensation valve core I2 are formed in the circumferential surface of the compensation valve core I2. The oil port D11 and the oil port A8 are always oppositely communicated; when the main valve core 1 is not communicated with oil, the oil port C10 is not communicated with the oil port B9; when the main valve core 1 is filled with oil, the compensation valve core I2 gradually moves outwards under the action of oil pressure, and the oil port C10 and the oil port B9 are gradually and relatively communicated.
Similarly, the left end of the main valve core 1 is provided with a compensating valve core II 5, a return spring II 6 and a plug screw II 7; an oil port E12 and an oil port F13 which are communicated with the inner cavity of the left side of the main valve core 1 are formed in the circumferential surface of the left end of the main valve core 1; the circumferential surface of the compensating valve core II 5 is provided with an oil port G14 and an oil port H15 which are communicated with the inner cavity of the compensating valve core II 5.
The working principle is as follows:
as will be shown in conjunction with figure 3,
taking the compensating valve core I2 as an example;
an upper oil port A8 of the main valve core 1 is always communicated with an upper oil port D11 of the compensation valve core I2; the upper oil port B9 of the main valve core 1 and the upper oil port C10 of the compensation valve core I2 are not communicated at the initial positions;
when the main valve core 1 is in the right side direction changing state, an upper oil port A8 of the main valve core 1 is communicated with an oil inlet P, pressure oil enters an inner cavity of a compensating valve core I2, and an upper oil port B9 of the main valve core 1 is communicated with one of the working oil ports; according to a force balance formula p A1= F (F is the pressure of a return spring I, and A1 is the pressure-bearing area of an inner cavity of a compensation valve core I2), when the pressure p reaches a certain value, the compensation valve core I2 overcomes the spring force of a return spring I3 to do work, so that an oil port B9 on the main valve core 1 is communicated with an oil port C10 on the compensation valve core I2;
as described above;
when the main valve core 1 is in the left side direction changing state, an oil feeding port E12 of the main valve core 1 is communicated with an oil inlet P, pressure oil enters an inner cavity of the compensating valve core II 5, an oil feeding port F13 of the main valve core 1 is communicated with another working oil port, and similarly, when the pressure P reaches a certain value, the compensating valve core II 5 overcomes the spring force of a return spring II 6 to do work, so that an oil feeding port F13 of the main valve core 1 is communicated with an oil feeding port G14 of the compensating valve core 5;
the opening degrees of the oil port C10 of the compensation valve core I2 and the oil port G14 of the compensation valve core II 5 are in direct proportion to the pressure p in the inner cavity of the compensation valve core, namely the input pressure of the valve, so that the pressure compensation in the system is realized.
The embodiment is embedded into the inner cavity of the main valve core by the compensating valve core, and is a great improvement on the pressure compensation technology of the existing crane control valve, so that the pressure compensation and the main operation control structure are integrated, the size of the pressure compensation structure is greatly reduced, and the lightweight of a host system is finally realized.
Claims (3)
1. An embedded pressure compensating valve stem, comprising:
comprises a main valve core (1) and a compensation valve core I (2);
an inner cavity is formed in the end part of the main valve core (1), and an oil port A (8) and an oil port B (9) which are communicated with the inner cavity of the main valve core (1) are formed in the circumferential surface of the main valve core (1);
the compensation valve core I (2) is arranged in the inner cavity of the main valve core (1);
the outer end of the compensating valve core I (2) is connected with a return spring I (3) which provides an inward movement force for the compensating valve core I (2); the inner end of the compensation valve core I (2) is provided with an inner cavity, and the circumferential surface of the compensation valve core I (2) is provided with an oil port C (10) and an oil port D (11) which are communicated with the inner cavity of the compensation valve core I (2);
when the main valve core (1) is not communicated with oil, the oil port D (11) and the oil port A (8) are oppositely communicated, and the oil port C (10) and the oil port B (9) are not communicated; when the main valve core (1) is filled with oil, the compensation valve core I (2) gradually moves outwards under the action of oil pressure, and the oil port C (10) and the oil port B (9) are gradually and relatively communicated.
2. The embedded pressure compensating valve stem of claim 1, wherein: inner cavities are formed in two ends of the main valve core (1), a compensation valve core I (2) is installed in the inner cavity of the right end of the main valve core (1), and a compensation valve core II (5) is installed in the inner cavity of the left end of the main valve core (1).
3. The embedded pressure compensating valve stem of claim 1, wherein: the inner wall of the outer end of the inner cavity of the main valve core (1) is provided with internal threads, and the outer end of the inner cavity of the main valve core (1) is connected with a plug screw I (4) through threads; and the reset spring I (3) is arranged between the outer end of the main valve core (1) and the inner end of the screw plug I (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911052948.0A CN110778555B (en) | 2019-10-31 | 2019-10-31 | Embedded pressure compensation valve rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911052948.0A CN110778555B (en) | 2019-10-31 | 2019-10-31 | Embedded pressure compensation valve rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110778555A CN110778555A (en) | 2020-02-11 |
| CN110778555B true CN110778555B (en) | 2021-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911052948.0A Active CN110778555B (en) | 2019-10-31 | 2019-10-31 | Embedded pressure compensation valve rod |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113931891B (en) * | 2021-09-28 | 2024-03-01 | 常德中联重科液压有限公司 | Load port independent control load sensitive multi-way valve and hydraulic system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3774635A (en) * | 1972-04-18 | 1973-11-27 | Sperry Rand Corp | Power transmission |
| US3985153A (en) * | 1974-08-28 | 1976-10-12 | Tomco, Inc. | Pressure compensating valve spool assembly for a hydraulic control valve |
| US4117862A (en) * | 1977-02-07 | 1978-10-03 | Tomco, Inc. | Pressure compensated control valve |
| CN107420368A (en) * | 2017-09-29 | 2017-12-01 | 宁波克泰液压有限公司 | Adjustable compensation formula one-way flow valves |
| CN108131346A (en) * | 2017-12-21 | 2018-06-08 | 宁波文泽机电技术开发有限公司 | A kind of threeway one-way speed-regulating valve |
| CN108691839A (en) * | 2018-07-26 | 2018-10-23 | 佛山信卓派思机械科技有限公司 | A kind of plug-in pile-up valve |
-
2019
- 2019-10-31 CN CN201911052948.0A patent/CN110778555B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3774635A (en) * | 1972-04-18 | 1973-11-27 | Sperry Rand Corp | Power transmission |
| US3985153A (en) * | 1974-08-28 | 1976-10-12 | Tomco, Inc. | Pressure compensating valve spool assembly for a hydraulic control valve |
| US4117862A (en) * | 1977-02-07 | 1978-10-03 | Tomco, Inc. | Pressure compensated control valve |
| CN107420368A (en) * | 2017-09-29 | 2017-12-01 | 宁波克泰液压有限公司 | Adjustable compensation formula one-way flow valves |
| CN108131346A (en) * | 2017-12-21 | 2018-06-08 | 宁波文泽机电技术开发有限公司 | A kind of threeway one-way speed-regulating valve |
| CN108691839A (en) * | 2018-07-26 | 2018-10-23 | 佛山信卓派思机械科技有限公司 | A kind of plug-in pile-up valve |
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| Publication number | Publication date |
|---|---|
| CN110778555A (en) | 2020-02-11 |
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